12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273 |
- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * 32-bit x86 Startup Code when running from SPL. This is the startup code in
- * U-Boot proper, when SPL is used.
- * Copyright 2018 Google, Inc
- * Written by Simon Glass <sjg@chromium.org>
- */
- #include <config.h>
- .section .text.start
- .code32
- .globl _start
- .type _start, @function
- _start:
- /* Set up memory using the existing stack */
- movl $(CONFIG_SYS_CAR_ADDR + CONFIG_SYS_CAR_SIZE - 4), %eax
- #ifdef CONFIG_DCACHE_RAM_MRC_VAR_SIZE
- subl $CONFIG_DCACHE_RAM_MRC_VAR_SIZE, %eax
- #endif
- /*
- * We don't subject CONFIG_DCACHE_RAM_MRC_VAR_SIZE since memory is
- * already set up. This has the happy side-effect of putting gd in a
- * new place separate from SPL, so the memset() in
- * board_init_f_init_reserve() does not cause any problems (otherwise
- * it would zero out the gd and crash)
- */
- call board_init_f_alloc_reserve
- mov %eax, %esp
- call board_init_f_init_reserve
- call x86_cpu_reinit_f
- xorl %eax, %eax
- call board_init_f
- call board_init_f_r
- /* Should not return here */
- jmp .
- .globl board_init_f_r_trampoline
- .type board_init_f_r_trampoline, @function
- board_init_f_r_trampoline:
- /*
- * SPL has been executed and SDRAM has been initialised, U-Boot code
- * has been copied into RAM, BSS has been cleared and relocation
- * adjustments have been made. It is now time to jump into the in-RAM
- * copy of U-Boot
- *
- * %eax = Address of top of new stack
- */
- /* Stack grows down from top of SDRAM */
- movl %eax, %esp
- /* Re-enter U-Boot by calling board_init_f_r() */
- call board_init_f_r
- die:
- hlt
- jmp die
- hlt
- .align 4
- _dt_ucode_base_size:
- /* These next two fields are filled in by binman */
- .globl ucode_base
- ucode_base: /* Declared in microcode.h */
- .long 0 /* microcode base */
- .globl ucode_size
- ucode_size: /* Declared in microcode.h */
- .long 0 /* microcode size */
|